diff --git a/src/sage/arith/all__sagemath_objects.py b/src/sage/arith/all__sagemath_objects.py
new file mode 100644
index 00000000000..38e44245ad3
--- /dev/null
+++ b/src/sage/arith/all__sagemath_objects.py
@@ -0,0 +1,2 @@
+# The presence of this file ensures that sage_setup for sagemath-objects
+# considers this directory as a namespace package
diff --git a/src/sage/ext/all__sagemath_objects.py b/src/sage/ext/all__sagemath_objects.py
new file mode 100644
index 00000000000..38e44245ad3
--- /dev/null
+++ b/src/sage/ext/all__sagemath_objects.py
@@ -0,0 +1,2 @@
+# The presence of this file ensures that sage_setup for sagemath-objects
+# considers this directory as a namespace package
diff --git a/src/sage/libs/all__sagemath_objects.py b/src/sage/libs/all__sagemath_objects.py
new file mode 100644
index 00000000000..38e44245ad3
--- /dev/null
+++ b/src/sage/libs/all__sagemath_objects.py
@@ -0,0 +1,2 @@
+# The presence of this file ensures that sage_setup for sagemath-objects
+# considers this directory as a namespace package
diff --git a/src/sage/rings/all__sagemath_objects.py b/src/sage/rings/all__sagemath_objects.py
new file mode 100644
index 00000000000..38e44245ad3
--- /dev/null
+++ b/src/sage/rings/all__sagemath_objects.py
@@ -0,0 +1,2 @@
+# The presence of this file ensures that sage_setup for sagemath-objects
+# considers this directory as a namespace package
diff --git a/src/sage/sets/all__sagemath_objects.py b/src/sage/sets/all__sagemath_objects.py
new file mode 100644
index 00000000000..38e44245ad3
--- /dev/null
+++ b/src/sage/sets/all__sagemath_objects.py
@@ -0,0 +1,2 @@
+# The presence of this file ensures that sage_setup for sagemath-objects
+# considers this directory as a namespace package